webos-image: libpbnjson=35,v2.7.0

:Release Notes:
resolve referred schemas right after parsing,
develop a command line tool to validate JSON.

:Detailed Notes:
submissions/32..submissions/35
5a19d2c Fix compatibility with 2.6 version of pbnjson
11b3b36 Add compatibility with 2.6 version of pbnjson
0a214cf Resolve referred schemas right after parsing
9594392 Implement JSON validation in the pbnjson_validate
d66e2ba Allow reporting schema parsing errors in C++
0b4cd67 Create skeleton for pbnjson_validate

:Testing Performed:
unit tests, build

:QA Notes:

:Issues Addressed:
[BHV-2621] Develop a command line tool to validate JSON against schema
[BHV-1564] Resolve referred schemas right after parsing
[BHV-7907] CCC: libpbnjson=35,v2.7.0

Open-webOS-DCO-1.0-Signed-off-by: Andrii Zora <andrii.zora@lge.com>

Change-Id: Iff547f62976de09d170a56a4c847ffdf050a256d
Reviewed-on: https://g2g.palm.com/5670
Reviewed-by: DCO Verification
Build: Andrii Zora <andrii.zora@lge.com>
Reviewed-by: Andrii Zora <andrii.zora@lge.com>
Reviewed-by: Build Verification
Tested-by: Andrii Zora <andrii.zora@lge.com>
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>